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Phylum Chordata. A. Phylum Chordata: [Fig 12.1] Subphylum Urochordata tunicate tadpole larvae Note 4 chordate characteristics: 1. Dorsal hollow nerve cord 2. Notochord 3. Gill Slits 4. Post-anal Tail (A). A. A. B. C. D. E. A. B. C. D. E. - PowerPoint PPT Presentation
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Phylum Chordata
A
Phylum Chordata: [Fig 12.1] Subphylum Urochordata tunicate tadpole larvae
Note 4 chordate characteristics:
1. Dorsal hollow nerve cord2. Notochord3. Gill Slits4. Post-anal Tail (A)
A
A
B
C
D
E
Phylum Chordata: Subphylum Cephalochordata [Fig. 12.2, dorsal view]Note: dorsal fin rays (A), myomeres (B), dorsal hollow nerve cord (=nerve tube (C), notochord (D), gill slits & bars (E)
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Phylum Chordata: Subphylum Cephalochordata [Fig. 12.3, dorsal view]Note: fin ray (A), myomeres (B), dorsal hollow nerve cord (nerve tube) (C), notochord (D)
D
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EF
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Phylum Chordata: Subphylum Cephalochordata [Fig.12.3 cs- anterior region]
Note: ovaries(A) gill bars(B), gill slits(C), Pharynx (D), endostyle (E), metapleural folds (F), atrium (G)
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Phylum Chordata: Subphylum Cephalochordata [Fig.12.3, cs- posterior region]Note: myomeres (A), ovaries (B), atrium (C), metapleural folds (D),
B
A
D D
CB
